I have just watched the poignant video posted and the first symptom shown was costochondritis and I wondered what other people's experiences of this were. I've never been diagnosed with it. When I've read about it, it says it goes on for weeks, but when I've had this pain it last a few seconds or minutes. The longest ever was over half an hour. When I've had it it has been like a vice across my chest and I'm unable to breathe in (breathing in or moving makes it worse) and it's really horrible and frightening. It feels like I'd imagine a heart attack to feel.